plain bearings

Function Plain bearings support and guide moving components inside the engine. Their primary purpose is to facilitate the virtually wear-free rotation of these components. Plain bearings comprise one or two bearing shells which are locked firmly in place in the bearing seat. The bearing shells wrap around the rotating shaft at the bearing journals.The wear on a plain bearing engine occurs when the engine is first started. On startup there is no oil flow or oil pressure so there is a minute amount of wear before the oil pressure comes up. Plain Bearings with no bushing are usually used for the camshaft in the cylinder head. There are several ways they are used.

Plain Bearings. The earliest blocks used plain bearings, but they have slowly given way to higher-performing bearings. Plain bearings have the least number of moving parts. A long lifespan and low maintenance with heavy load applications are the main benefits of plain bearings.

Bearing Number	Bore Dia	Outer DIa	Width	Size
AST AST20 160100 plain bearings	6706	30x37x4	30	37
50 mm x 75 mm x 35 mm SKF GE50CJ2 plain bearings	6414	70x180x42	70	180
AST AST650 152110 plain bearings	6805	25x37x7	25	37
90 mm x 150 mm x 85 mm FBJ GEG90ES-2RS plain bearings	HM256800	Imperial	1.78	16.6250 in
70 mm x 110 mm x 58 mm NTN SA4-70B plain bearings	6315/VA201	75x160x37	75	160
95,25 mm x 149,225 mm x 83,337 mm NTN SA2-60B plain bearings	6708ZZ	40x50x6	40	50
AST AST650 223212 plain bearings	63802 ZZ	15x24x7	15	24
AST AST090 25080 plain bearings	6801DD	12x21x5	12	21
90 mm x 140 mm x 76 mm ISB GE 90 XS K plain bearings	62310-2RSR	50x110x40	50	110
88,9 mm x 149,225 mm x 90,424 mm LS GEGZ88ES-2RS plain bearings	6404	20x72x19	20	72
LS SIBP12S plain bearings	6800-2RS	10x19x5	10	19